.primes-board {
  text-align: center;
  margin: 1rem 0 1.25rem;
}

.primes-number {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.primes-factors {
  margin-top: 0.65rem;
  font-size: 1.25rem;
  font-weight: 600;
  min-height: 1.5em;
}

.primes-current {
  margin-top: 0.5rem;
  font-size: 1.05rem;
  opacity: 0.85;
}

.primes-prompt {
  margin-top: 1rem;
  font-size: 1.1rem;
}